Ionic liquid oxidation synthesis of Ag@AgCl core-shell structure for photocatalytic application under visible-light irradiation

被引：33
|
作者：
Xu, Yuanguo [1 ]
Xu, Hui [1 ]
Li, Huaming [2 ]
Yan, Jia [2 ]
Xia, Jiexiang [2 ]
Yin, Sheng [2 ]
Zhang, Qi [2 ]
机构：
[1] Jiangsu Univ, Sch Environm, Zhenjiang 212013, Peoples R China
[2] Jiangsu Univ, Sch Chem & Chem Engn, Zhenjiang 212013, Peoples R China
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2013年 / 416卷
关键词：
Ag@AgCl; Plasmon photocatalysts; Methyl orange; Bmim]FeCl4; 4-Chlorophenol; HIGHLY EFFICIENT; PLASMONIC PHOTOCATALYST; OPTICAL-PROPERTIES; TITANIUM-DIOXIDE; TIO2; HETEROJUNCTION; NANOSTRUCTURES; NANOPARTICLES; CONVERSION; NANOWIRES;
D O I：
10.1016/j.colsurfa.2012.07.014
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Ag@AgCl core-shell nanocomposite was synthesized by using [Bmim]FeCl4 IL etching Ag nanowires into Ag@AgCl in solution at room temperature. The obtained samples exhibited highly visible-light photocatalytic ability for the degradation of methyl orange and 4-chlorophenol in water solution. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) confirmed the presence of Ag and AgCl crystals. Scanning electron microscopy (SEM) images and X-ray energy-dispersive spectroscopy (EDS) of the samples revealed that AgCl nanoparticles (NPs) formed on the surface of Ag nanowires. UV-vis spectroscopy showed that Ag@AgCl core-shell structure enhanced its absorption in the visible-light region. The results showed that the absorption ability of Ag@AgCl was related to the change of Ag@AgCl. The absorption ability of the samples increased with the increasing etching time, and the enhancing photocatalytic ability was due to the increasing plasmonic absorbance of the photocatalysts. The effect of the etching time on the photocatalyst activity was studied, and the reaction mechanism was proposed. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：80 / 85
页数：6
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